75531612 has 96 divisors (see below), whose sum is σ = 211680000. Its totient is φ = 20708352.

The previous prime is 75531611. The next prime is 75531613. The reversal of 75531612 is 21613557.

It is an interprime number because it is at equal distance from previous prime (75531611) and next prime (75531613).

It is a super-2 number, since 2×75531612² = 11410048822637088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75531612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75531611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49639 + ... + 51137.

It is an arithmetic number, because the mean of its divisors is an integer number (2205000).

Almost surely, 2^75531612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75531612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105840000).

75531612 is an abundant number, since it is smaller than the sum of its proper divisors (136148388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75531612 is a wasteful number, since it uses less digits than its factorization.

75531612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555 (or 1553 counting only the distinct ones).

The product of its digits is 6300, while the sum is 30.

The square root of 75531612 is about 8690.8924743090. The cubic root of 75531612 is about 422.7103852828.

The spelling of 75531612 in words is "seventy-five million, five hundred thirty-one thousand, six hundred twelve".